The weeks following April 15 are when cybercriminals go to work. Norwood CPA firms have just spent three months handling the most sensitive financial data their clients produce — W-2s, bank statements, Social Security numbers, business financials — and they've been too busy to think about security. Now they have time. So do attackers.
Accounting practices are a high-value target year-round, but the post-tax-season window is particularly dangerous. Staff are tired, attention is scattered, and systems that ran hard through Q1 haven't been audited in months. If your firm uses QuickBooks, Drake Tax, or Sage, you have client financial data sitting in systems that need more than a password to protect.
What Attackers Already Know About Your Practice
Phishing emails targeting accounting staff spike in late April and May. The lure is usually IRS-adjacent — a rejected e-file notification, a client query about a refund, a software update from a vendor. These aren't spray-and-pray campaigns; they're targeted. Attackers know which software accounting firms use and build their payloads accordingly.
Once inside, the playbook is straightforward: exfiltrate client data, drop ransomware, and wait. The ransom demand for a mid-size CPA firm typically runs $50,000–$250,000. The actual cost — including downtime, client notification, regulatory exposure, and reputational damage — runs higher. The FTC Safeguards Rule, updated in 2023, now requires any business with access to customer financial data — including accounting firms — to maintain a formal information security program. That means written policies, risk assessments, access controls, and incident response planning. Most Norwood practices don't have all of these in place.
Where the Gaps Actually Are
The most common weak points in accounting firm infrastructure aren't exotic. They're predictable.
Shared credentials are rampant. Multiple staff members accessing Drake Tax or QuickBooks under the same login defeats the entire purpose of audit logging. When a breach occurs, you can't determine who accessed what or when — and regulators notice.
Remote access is often uncontrolled. Many firms set up VPNs or RDP during COVID and never hardened them. RDP exposed to the internet is one of the most consistently targeted attack vectors in existence. If your staff accesses the office server over RDP without a VPN and MFA, that connection is being probed right now.
Backups exist, but recovery has never been tested. A backup appliance running in the corner doesn't mean you can recover. If you haven't performed a test restore in the past six months, you don't actually know what you have. Ransomware groups know this — they target backup infrastructure first specifically because firms assume it works.
Microsoft 365 is under-configured. M365 ships with baseline protection that isn't sufficient for a firm handling sensitive financial data. Without DKIM, DMARC, anti-phishing policies, and conditional access enforcing MFA, you're relying on staff awareness as your primary defense. That's not a strategy.
What a Hardened Accounting Practice Actually Looks Like
A properly secured CPA firm isn't running a complex enterprise security stack — it's running the right stack, configured correctly. That starts with endpoint detection and response (EDR) on every workstation and server. Tools like SentinelOne catch behavioral anomalies that signature-based antivirus misses entirely. Layering in Huntress MDR adds human analysts monitoring threat activity around the clock, so you're not dependent on an alert going to someone's inbox that's already overflowing.
For firms that have moved to Microsoft 365, managed M365 services should include MFA enforcement, conditional access policies, and periodic review of permission grants and third-party app access. The default M365 configuration is not a secure configuration — it's a starting point.
Backup and disaster recovery services built on Veeam with documented recovery time objectives mean you can answer the question "how long until we're back online?" before a ransomware attack, not during one. Offsite, immutable backups are the difference between paying a ransom and recovering cleanly.
Bringing it together, managed cybersecurity services covering SIEM, EDR, and MDR reduce the burden on practice managers who shouldn't have to double as IT security professionals while running a tax practice. The goal is visibility and response, not just tools on a shelf.
The FTC Safeguards Rule and the IRS WISP — Both Required
The 2023 updates to the FTC Safeguards Rule applied to CPA firms immediately. Non-compliance isn't just a regulatory exposure — it's evidence of negligence if a breach occurs and litigation follows. Your written information security program needs to designate a qualified individual to oversee it, conduct annual risk assessments, and document controls in place. Most Norwood practices we've seen don't have this documentation.
The IRS separately requires a Written Information Security Plan (WISP) for all tax preparers. It's not optional and it's not bureaucratic overhead — it's a documented baseline that tells you and your staff exactly what to do when something goes wrong. If you don't have one, that's a straightforward gap to close.
The Post-Season Window Is the Right Time to Act
With tax season behind you, the workload is finally manageable enough to address the infrastructure that's been running on borrowed time since January. An IT security assessment from a firm that understands accounting practice operations — not just generic IT — takes a few hours and gives you a clear picture of where you stand.
Titan Tech works with CPA and accounting firms across Norwood and the Cincinnati area to harden infrastructure, implement FTC Safeguards-compliant security programs, and prepare practices for whatever the next threat window brings. Reach out here to schedule an assessment while the calendar is open.